Sash-lock.



Patented Oct. 3, |899.

Vnu. 634,020.

J. Lk. DEFINGER.

UNITED STAT-Es PATENT OFFICE.

JOHN LEE OEFINGER, OE CHICAGO, ILLINOIS.

sASH-LooK.

SPECIFICATION forming part of Letters Patent No. 634,020, dated October 3, 1899.

l Application iled June 19, 1899. Serial No. 721,013. (No model.)

T0 @ZZ whom it may concern:

Be it known that I, JOHN LEE OEFINGER, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Sash-Locks; andI do hereby declare that the followingisa full, clear, and exact description thereof, reference being had to the accompanying draw'- ings, and to the letters of. reference marked thereon, which form apart of this specifica- This invention relates to an improved sash fastener or lock of that class embracing a cam-lever pivoted on one of the sliding sash of a window and adapted to engage the other sash or a relatively immovable part in a manner to prevent the window being opened, but allowing the same to be readily closed.

The invention is more fully set forth and defined in the appended claim.

In the drawings, Figure 1 is a fragmentary view illustrating the device embodying my' invention as applied to and locking the upper and lower sliding sash of an ordinary window. Fig. 2 is a side elevation of the same, showing the position the parts assume when at a locking engagement with the sash. Fig. 3 is a section taken on line 3 3 of Fig. 2. Fig. 4 is a top plan View of the same. Fig. 5 is a front elevation of the same.

. In the drawings, A indicates the lower sliding sash of a window, and A the' upper sash of the same.

B indicates a sheet-metal plate secured at the top of the lower sash transversely thereto and at one corner thereof. t bindicate two perpendicular side ilanges integral with said plate and having lpivoted between the same a lever C. Said lever is providedonits inner end with an enlarged part c, adapted to be manually engaged, and upon its forward or outer end with a cam-surface o', adapted to engage one of the side rails of the upper sash Ain such manner that an attempt to, raise the lower sash or to lower the upper sash will cause they said cam-surface to jam against the said part of the upper sash and thereby firmly lockthe two sashes together. cates a spring inserted between the plate B andsaid lever and acting to hold the outer or cam end thereof at all times in positive en gagement with the sash.

E indi- The window-sash A and A' are preferably supported on weights or other balancing means,whereby they are supported in any desired position in the frame. The plate B of the fastener or lock is secured to the upper or horizontal surface of the top rail'of the said sash by means of screws which pass through the corners of said plate and enter the wood of the said sash.. For the purpose of relieving the said screws fro'm a part of the lateral strain due to the jamming action ofthe said cam-lever against the upper sash a depending flange or lip b is provided at the front or forms an additional means of securing or firmly vattachin g the said fastener to the sash through the engagement of said flange with the front or outer side of the 'sash-rail. The said lip or flange h may be provided with screw holes, and screws may be inserted therethrough into the sash., As a rule, however, this will not be necessary, inasmuch as the strain upon the plate is transverse of the sash, and the said lip or flange b is hooked over and extends down on the outer side of the sash-rail, whereby any strain coming on the plate B is resisted principally by the bearing contact of the flange against the outer face of the sash-rail. The said anges bb are preferably integral with the plate B, and the plate, with its flanges, .may be conveniently constructed by stamping the same from sheet metal. A pivot pin D passes transversely through the upper part of each of the flanges b b', and the lever C is pivoted thereon. The cam end c" of' said lever is outer margin orv end of the said platev B and shown as curved upwardly, eccentric to the pivot, and is provided on each side with a lateral flange, thereby greatly increasing the width of the surface. For the purpose of increasing the frictionaleffect of the said camsurface on thesiderail of the vsash the outer face of the cam is corrugated, as shown in Figs. l, 2, and 5. Y y

' The spring E may be of any desired form, but as shown is aV spiral compression-spring, one end of which rests in a socket-pieceB, which is secured upon the saidplate B at the rear of the 'said Vflanges h. Theupper end of said spring engages the rear end of the lever, on the under side thereof, and by its resiliency holds the same elevated, or, in other 'loo words, causes thc outer end of the lever to be depressed into positive engagement with the side rail of the upper sash. Itis manifest, however, that by depressing the inner end of the lever the oui-er end thereof will be elevated and owing to the eccentricity of the canbsurfaee will be Withdrawn out of engagement with the upper sash.

The operation of my device is as follows: A fastener secured to a window as described, vwith its cam end engaging the side rail of the upper sash,will hold both sash securelylockcd after the windows have been closed, inasmuch as any motion of either sash against the cam will force the saine into closer engagement with the part engaged therewith. If, however, the lower sash has been raised somewhat from its lowermost or closed position, the engagement of the upper sash by the camlever will prevent either the lower sash from being raised or the upper sash from being lowered to a greater extent than sufficient to close the lower sash. If both sash are opened, no resistance will be oered to the closing of either or both sash; but if it be attempted to raise the lower sash or lower the upper sash the cam immediatelyengages on the side rail of the upper sash, as before described, and firmly locks both sash from relative movement.

From the simple construction of this device and the manner in which lateral strain is conveyed to the sash it isobvious that it possesses very great strength.- ln fact, the same is of i a strength approximately equal to that of the sash. i

' Obviously thisdevice need not be in all cases secured to the top of the lowersash. It may be attached to the Window-j amb, provided there is but one sash in the Window, or may be secured otherwise than as shown if the sash slides horizontally.

I claim as my invention- A fastener for sliding sash comprising a sheetanctal plate provided at its outer edge with an integral depending lip or ange, and having perpendicular side Iianges integral with the plate, a socket-piece attached to the said plate at the inner end of the latter, a le ver pivoted between said side flanges, having on its outer end a laterally-extended cam-surface, the inner end of said lever being adapted for manual engagement, and acompressionspring, one end of which is inserted in said socket-piece and the other end of which engages said lever and acts normally to hold the same in its locking position.

In testimony that I claim the foregoing as my invention I affix my signature, in presence of two Witnesses, this 16th day of June, A. D. 1809. A

JOI-IN LEE OEFINGER.

Witnesses:

OHARLEs W. HILLS, GERTRUDE BRYCE. 

